The only mechanical quantity which has negative dimension of mass is

Step-by-step solution

aligned & F= G m₁ m₂ r^2 or G= F r^2 m₁ m₂ & [G]= [ MLT ⁻² ~L ^2 M ^2 ] or [G]= [ M ⁻¹ ~L ^3 ~T ⁻² ] aligned